package com.example.forum.services.impl;

import com.example.forum.common.AppResult;
import com.example.forum.common.ResultCode;
import com.example.forum.dao.ArticleMapper;
import com.example.forum.exception.ApplicationException;
import com.example.forum.model.Article;
import com.example.forum.model.Board;
import com.example.forum.model.User;
import com.example.forum.services.IArticleService;
import com.example.forum.services.IBoardService;
import com.example.forum.services.IUserService;
import com.example.forum.utils.StringUtil;
import jakarta.annotation.Resource;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

import java.util.Date;
import java.util.List;


@Slf4j
@Service
public class ArticleServiceImpl implements IArticleService {

    @Resource
    private ArticleMapper articleMapper;
    // 用户和板块的操作
    @Resource
    private IUserService userService;
    @Resource
    private IBoardService boardService;

    @Override
    public void createArticle(Article article) {
        if (article == null || article.getUserId() == null || article.getBoardId() == null
                || StringUtil.isEmpty(article.getTitle())
                || StringUtil.isEmpty(article.getContent())) {
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }

        // 设置默认值
        article.setVisitCount(0);
        article.setLikeCount(0);
        article.setReplyCount(0);
        article.setState((byte) 0);
        article.setDeleteState((byte) 0);
        Date date= new Date();
        article.setCreateTime(date);
        article.setUpdateTime(date);

        // 写入数据库
        int articleRow = articleMapper.insertSelective(article);
        if (articleRow <= 0) {
            log.warn(ResultCode.FAILED_CREATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_CREATE));
        }

        // 更新用户发帖数
        User user = userService.selectById(article.getUserId());
        // 没有找到用户
        if (user == null) {
            log.warn(ResultCode.FAILED_CREATE.toString()+", 发帖失败，userId:{}", article.getUserId());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_CREATE));
        }

        userService.addOneArticleCountById(user.getId());

        // 获取板块信息
        Board board = boardService.selectById(article.getBoardId());
        if (board == null) {
            log.warn(ResultCode.FAILED_CREATE.toString()+", 发帖失败，boardId:{}", article.getBoardId());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_CREATE));
        }
        // 更新板块帖子数
        boardService.addOneArticleCountById(board.getId());

        log.info(ResultCode.SUCCESS.toString()+", userId:{}", article.getUserId()
        + ", boardId:{}", article.getBoardId() + ", article ID" + article.getId() +"发帖成功");

        // throw new ApplicationException(AppResult.failed("测试事务回滚"));
    }

    @Override
    public List<Article> selectAll() {
        // 调用DAO
        return articleMapper.selectAll();
    }

    @Override
    public List<Article> selectAllByBoardId(Long boardId) {
        if (boardId == null || boardId <= 0) {
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }

        // 校验板块是否存在
        Board board = boardService.selectById(boardId);
        if (board == null) {
            log.warn(ResultCode.FAILED_BOARD_NOT_EXISTS.toString()+", 板块不存在，boardId:{}", boardId);
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_BOARD_NOT_EXISTS));
        }

        // 调用DAO,查询指定板块的帖子

        return articleMapper.selectAllByBoardId(boardId);
    }

    @Override
    public Article selectDetailById(Long id) {
        if (id == null || id <= 0) {
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }

        // 调用DAO,查询指定id的帖子
        Article article = articleMapper.selectDetailById(id);
        if (article == null) {
            log.warn(ResultCode.FAILED_ARTICLE_NOT_EXISTS.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_NOT_EXISTS));
        }

        // 更新访问次数
        Article updateArticle = new Article();
        updateArticle.setId(article.getId());
        updateArticle.setVisitCount(article.getVisitCount() + 1);
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if (row != 1) {
            log.warn(ResultCode.ERROR_SERVICES.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));
        }
        // 更新访问次数
        article.setVisitCount(article.getVisitCount() + 1);
        return article;
    }

    @Override
    public void modify(Long id, String title, String content) {
        if (id == null || id <= 0 || StringUtil.isEmpty(title)
                || StringUtil.isEmpty(content)) {
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        // 构建要更新的对象
        Article updateArticle = new Article();
        updateArticle.setId(id);
        updateArticle.setTitle(title);
        updateArticle.setContent(content);
        updateArticle.setUpdateTime(new Date());
        // 调用DAO
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if (row != 1) {
            log.warn(ResultCode.ERROR_SERVICES.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));
        }
    }

    @Override
    public Article selectById(Long id) {
        if (id == null || id <= 0 ) {
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        // 调用DAO
        return articleMapper.selectByPrimaryKey(id);
    }

    @Override
    public void thumbsUpById(Long id) {
        if(id == null || id <= 0){
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }

        // 获取帖子详情
        Article article = articleMapper.selectByPrimaryKey(id);

        if (article == null || article.getDeleteState() == 1) {
            log.warn(ResultCode.FAILED_ARTICLE_NOT_EXISTS.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_NOT_EXISTS));
        }

        if (article.getState() == 1) {
            log.warn(ResultCode.FAILED_ARTICLE_BANNED.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_BANNED));
        }
        // 构建要更新的对象
        Article updateArticle = new Article();
        updateArticle.setId(article.getId());
        updateArticle.setLikeCount(article.getLikeCount() + 1);

        // 调用DAO
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if (row!= 1) {
            log.warn(ResultCode.ERROR_SERVICES.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));
        }
    }

    @Override
    public void deleteById(Long id) {
        if(id == null || id <= 0){
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        Article article = articleMapper.selectByPrimaryKey(id);
        if (article == null || article.getDeleteState() == 1) {
            log.warn(ResultCode.FAILED_ARTICLE_NOT_EXISTS.toString() + ", articleId:{}", id);
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_NOT_EXISTS));
        }
        // 构建要更新的对象
        Article updateArticle = new Article();
        updateArticle.setId(article.getId());
        updateArticle.setDeleteState((byte) 1);

        // 调用DAO
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if (row!= 1) {
            log.warn(ResultCode.ERROR_SERVICES.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));
        }
        // 更新板块帖子数
        boardService.subOneArticleCountById(article.getBoardId());
        // 更新用户发帖数
        userService.subOneArticleCountById(article.getUserId());
        log.info("删除帖子成功， articleId:{} , boardId:{}",article.getId(), article.getBoardId());
    }

    @Override
    public void addOneReplyCountById(Long id) {
        if(id == null || id <= 0){
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        Article article = articleMapper.selectByPrimaryKey(id);
        // 校验帖子状态
        if (article == null || article.getDeleteState() == 1) {
            log.warn(ResultCode.FAILED_ARTICLE_NOT_EXISTS.toString() + ", articleId:{}", id);
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_NOT_EXISTS));
        }
        // 帖子已封贴
        if (article.getState() == 1) {
            log.warn(ResultCode.FAILED_ARTICLE_BANNED.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_BANNED));
        }

        // 构建要更新的对象
        Article updateArticle = new Article();
        updateArticle.setId(article.getId());
        updateArticle.setReplyCount(article.getReplyCount() + 1);
        updateArticle.setUpdateTime(new Date());
        // 调用DAO
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if (row!= 1) {
            log.warn(ResultCode.ERROR_SERVICES.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));
        }
    }

    @Override
    public List<Article> selectByUserId(Long userId) {
        if(userId == null || userId <= 0){
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        // 校验用户是否存在
        User user = userService.selectById(userId);
        if (user == null) {
            log.warn(ResultCode.FAILED_USER_NOT_EXISTS.toString() + ", userId:{}", userId);
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_USER_NOT_EXISTS));
        }
        // 调用DAO
        return articleMapper.selectByUserId(userId);
    }
}
